MARLBOROUGH, Mass.--(BUSINESS WIRE)--Xcellerex, Inc. announced today that it has begun construction of a state-of-the-art cGMP FlexFactory® biomanufacturing facility at its headquarters location in Marlborough, Massachusetts. Construction will be completed in September 2010. The facility, the second FlexFactory at the company’s headquarters site, will expand Xcellerex’s capacity to provide bridge biomanufacturing services for clients that are planning or building their own FlexFactory facilities. The plant will also support Xcellerex’s contract manufacturing operations.